/* 表单样式 */
body {
    font-family: Arial, sans-serif;
    padding: 20px;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
}

input[type="text"],
textarea {
    width: 300px;
    padding: 8px;
    border: 2px solid #6495ed; /* 默认蓝色边框 */
    box-sizing: border-box;
}

input[type="text"]:focus,
textarea:focus {
    border-color: red; /* 焦点时红色边框 */
    outline: none;
}

textarea {
    height: 100px;
    resize: vertical;
}

.radio-group label {
    display: inline-block;
    font-weight: normal;
    margin-right: 15px;
}

input[type="checkbox"] {
    vertical-align: middle;
}

button {
    background-color: #2196f3;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}

button:hover {
    background-color: #0b7dda;
}